90870175202 has 4 divisors (see below), whose sum is σ = 136305262806. Its totient is φ = 45435087600.

The previous prime is 90870175189. The next prime is 90870175241. The reversal of 90870175202 is 20257107809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20257107809 = 17 ⋅1191594577.

It can be written as a sum of positive squares in only one way, i.e., 54911017561 + 35959157641 = 234331^2 + 189629^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 90870175202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22717543799 + ... + 22717543802.

Almost surely, 2^90870175202 is an apocalyptic number.

90870175202 is a deficient number, since it is larger than the sum of its proper divisors (45435087604).

90870175202 is a wasteful number, since it uses less digits than its factorization.

90870175202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45435087603.

The product of its (nonzero) digits is 70560, while the sum is 41.

The spelling of 90870175202 in words is "ninety billion, eight hundred seventy million, one hundred seventy-five thousand, two hundred two".